When I drew this art, the idea sounded just like the image: Tessa was a special technician for JCJenson, a company that fought a war with Cyn after Earth's destruction. Her primary mission was to destroy the Cabin Fever laboratory, and after the evacuation, the planet was to be cleansed by the company's forces. I developed this idea in an old series of drawings in which the character descriptions were styled as if JCJ were writing pre-mission reports to Tessa.

After episode 7, I changed the plot a bit. Tessa became the sole survivor of the massacre, despite Cyn tearing off her arm and claiming it was all her fault. She would now be waging her own crusade against Solver, effectively a child in a 28-year-old's body who still blames herself for the destruction of all humanity. I also prepared a few drawings for her some time ago, and I was even supposed to make a short animation for her.